Update guides pt-BR [ci skip]

[skip ci] Update db-query-builder.md

Переведен structure-modules.md

Переведен concept-events.md

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Docs guide ja update [ci skip]

Conflicts:
	docs/internals-ja/design-decisions.md

[skip ci] Fixed typo in ActiveField PHPDoc

Fixed typo in ActiveField PHPDoc

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Translated messages in [[i18n\Formatter.php]]

Переведен tutorial-yii-integration.md

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Fixed: Wrong namespace in advanced app backend unit test classes #6919

fixes #6903